This is a simpler yet deeper tutorial than the first, as it focuses on how one can manipulate layer modes (also known as "blending modes"). While actually turning these modes on and off isn't difficult at all, one needs a good amount of skill to use them to their full potential.

There are surprisingly few tutorials available that discuss layer modes and their uses; this is likely due to the perceived notion that the use of such modes is intuitive. To an extent, it is--but that isn't always the case! Some people pick it up quickly, while others never quite understand it.

This tutorial--save for the portions that use the Heal Brush--can be used for nearly all image-editing programs. Also, please note that it is very, very long, and very image-heavy.

( The wonderful world of layer modes! )